This site introduces unknown composer Emanuel Bach (C. P. E. Bach). This English version was translated from Japanese one by ChatGPT.
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in D minor Wq. 50-04 (H. 139) is one of the works that showcases his unique musical style. This sonata consists of three movements, each demanding different emotions and techniques. The first movement has a graceful and light atmosphere, captivating the listener with its charm. The following second movement possesses deep emotion and introspective beauty, highlighting Bachʼs expressive melodies. The final third movement is a lively and energetic finale, characterized by technical prowess and dynamic development. This sonata is an important work that demonstrates Emanuel Bachʼs innovative musical language and his role as a bridge to the Classical era.